html, body {
    height: 50%; /* vertical align */
}

body {
    background-color: #d6d6d6;	
}

div.vertical {
    text-align: center;
    position: relative;
    top: 50%;
}

div.text {
    font-size: 20px;
    margin-top: 20px;
}

img {
    border: 1px solid #999;
}